Machine for cutting articles



Jan. 6, 1942. D. o. HANNAN I 2,268,820

MACHINE FOR CUTTING ARTICLES Filed Nov. 29, 1940 /NVE/VTOR 0.- 0. HANNAN2AM Z.

Patented Jan. 6, 1942 I. a I a Z,268,820

Dan 0. Hannan, Baltimore, Md., assignor to Western Electric Company,Incorporated, New York, N. Y., a corporation of New York ApplicationNovember 29, 1940, Serial'No, 367,701

7 Claims. I (01. 164-60) This invention relates to a machine for cuttingarticles and more particularly to a machine for cutting insulation on aconductor.

In order to make an electrical connection to an insulated conductor, itis necessary to remove the insulation. In the past this has sometimesbeen doneby cutting or scraping the insulation from the conductor bymeans of pliers or a knife.

tion is taken off or the conductor itself is damaged.

An object of the present invention is the provisionof a machine forexpeditiously making .a

circumferential cut, as through the insulation on a conductor, withoutcutting the conductor itself.

In accordance with one embodiment of this invention, the insulation iscut by a rotating circular cutter while the conductor is supported inthe proper relation to the rotating cutter by means of adjustablerollers, and the conductor is rotated on said rollers by means of ablock which is pressed against the conductor and moved in a directiontangential to the revolving circular cutter.

A better understanding of the invention may be had by reference to thefollowing description and the accompanying drawing, in which The singleview of the drawing is a fragmentary elevational view of the machine.

The complete assembly of the apparatus is supported upon a work table orbench I. Mounted below the surface of this bench and completely coveredor guarded during the working operation, is a high-speed rotatingcircular cutter 2. This cutter is rigidly mounted on a shaft having alsosecured thereto a pulley l3. Passing over this pulley is a belt I lwhich serves to impart high-speed rotation to the cutter from a sourceof power such as a motor, not shown.

This method is slow and has the added disadvantagethat often too muchinsula-- Positioned over the cutter and partially coverupon the cuttingedge of the rotating disk cutter.

The operation of the device is as follows:

The operator adjusts the distance between the rollers 4 and 5 by meansof screw 8. When this distance is properly set, the revolving cutter 2will out through the insulation but will not cut the conductor. Theconductor 3 is placed on the rollers 4 and 5 with the cutter 2 at thepoint on the conductor where the circumferential cut is to be made. Theblock 9 is then pressed lightly down on the conductor and moved to theleft as viewed in the drawing. The friction between the block and theconductor will roll the conductor v in counterclockwise direction untilthe entire circumference of the insulation has been out. It is then asimple matter for the operator to strip the insulation from the end ofthe conductor to the circumferential cut. The circumferential.

cut will stop the insulation from tearing beyond the desired point.

As shown in the drawing, the members 5 and 1 act as guards to preventthe operators hand from coming in contact, with the revolving knife. Theonly exposed portion of the knife is that which is between the rollersand this is below the surface of the work bench.

It may be readily observed that during the entire cutting operation therotating cutter is completely covered by the adjustable blocks andconductor, thus preventing injury to the operator.

The embodiment of the invention herein disclosed is illustrative onlyand may be widely modified without departing from the spirit and scopeof the invention, and is to be limited solely by the appended claims.

What is claimed is:

1. In a machine for cutting a sheath, a rotary cutter, and means tosupport the sheath sothat the cutter can only cut to a predetermineddepth comprising opposed rollers rotatably supporting the sheath.

2. In a machine for cutting insulation on a conductor, a bench, arotating cutter supported with the periphery of the cutter below thesurface of the bench, and conductor supporting means adjacent theperiphery of the cutter comprising opposed rollers for rotatablysupporting the conductor to receive a circumferential cut.

3. In a machine for making a circumferential cut in the insulation on aconductor, a bench, a rotary cutter supported on the bench with theperiphery of the cutter below the surface of the bench, opposed rollersforming a semi-circle for supporting the conductor in position to becircumferentially cut, and means to rotate the conductor on the rollers.

4. In a machine for cutting a tubular sheath, a revolving cutter,opposed rollers for supporting the conductor in proper position to becut, and a block for revolving the conductor in a direction opposite tothe revolution of the cutter.

5. In a machine for cutting the insulation on a conductor, a revolvingcutter, opposed rollers arranged substantially in a semi-circle adjacentthe periphery of the cutter for supporting the conductor, and a blockfor rotating the conductor by pressing it between the said block and thesaid rollers and moving the block in a straight line.

6. An apparatus for cutting a sheath on a conductor comprising a table,a rotating cutting disc mounted under the surface of said table, saidtable having a slot above said cutting disc, and rollers adjacent theperiphery of said cutting disc for supporting a sheathed conductor insuch a position that the sheath will be cut circumferentially.

7. An apparatus for cutting a sheath on a conductor comprising a drivencutting disc of large diameter relative to the diameter of said sheath,and a plurality of rollers adjacent the periphery of said disc forsupporting a conductor and limiting its movement toward said disc.

DAN O. HANNAN.

